environments

Article Classification of Noise Sources for Area Noise Mapping

Luca Fredianelli 1 , Matteo Bolognese 2, Francesco Fidecaro 1 and Gaetano Licitra 2,3,*

1 Physics Department, University of , Largo Bruno Pontecorvo 3, 56127 Pisa, ; [email protected] (L.F.); francesco.fi[email protected] (F.F.) 2 Environmental Protection Agency of Region, Via V. Veneto 27, 56127 Pisa, Italy; [email protected] 3 Consiglio Nazionale delle Ricerche Istituto di Ingegneria del Mare, Via di Vallerano 139, 00128 Rome, Italy * Correspondence: [email protected]

Abstract: Maritime transportation is recognized to have advantages in terms of environmental impact compared to other forms of transportation. However, an increment in traffic volumes will also produce an increase in noise emissions in the surroundings for a greener source, as are frequently surrounded by urban areas. When more sources or higher noise emissions are introduced, the noise exposure of citizens increases, and the likelihood of official complaints rises. As a consequence, among the most demanding aspects of port management is effective noise management aimed at a reduction in the exposure of citizens while ensuring the growth of maritime traffic. At the same time, the topic has not been thoroughly studied by the scientific community, mostly because port areas are challenging from a noise management point of view; they are often characterized by a high degree of complexity, both in terms of the number of different noise sources and their interaction with the other main transportation infrastructure. Therefore, an effective methodology of noise modeling of the port area is currently missing. With regard to the INTERREG Maritime Program, the present paper reports a first attempt to define noise mapping guidelines. On the basis of the current state-of-the-art and the authors’ experiences, noise sources inside port areas can be divided into several different   categories: road sources, railway sources, ship sources, port sources, and industrial sources. A further subdivision can be achieved according to the working operation mode and position of the sources. Citation: Fredianelli, L.; Bolognese, M.; This classification simplifies actions of identification of the responsible source from control bodies, in Fidecaro, F.; Licitra, G. Classification of Noise Sources for Port Area Noise the case that noise limits are exceeded or citizen complaints arise. It also represents a necessary tool Mapping. Environments 2021, 8, 12. to identify the best placing of medium/long-term noise monitoring stations. The results also act as a https://doi.org/environments8020012 base for a future definition of specific and targeted procedures for the acoustic characterization of port noise sources. Academic Editor: Jian Kang Received: 31 December 2020 Keywords: port noise; harbor noise; noise mapping; noise sources; ship noise; noise emission; sustain- Accepted: 25 January 2021 able management; harbor noise; noise characterization; noise complaints; environmental pollution Published: 9 February 2021

Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in 1. Introduction published maps and institutional affil- Maritime traffic has constantly increased in recent years, and, despite the effects of iations. the recent pandemic, it is expected to continue its growth [1]. This will inevitably lead to an increase in noise emitted in the environment, if no proper management is established. It is known [2–4] that ships in the open sea have a non-negligible effect even on marine mammals, which use long-range underwater acoustic signals. On the other hand, in Copyright: © 2021 by the authors. ports, they represent moving sources placed at significant height and with broad noise Licensee MDPI, Basel, Switzerland. spectra, with low frequency components that can propagate at considerable distances [5]. This article is an open access article Considering all the activities connected to ports, which often act as industrial sites too, distributed under the terms and the port represents an area with high noise potential that, in many cases, is close to conditions of the Creative Commons inhabited areas. Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ Around the world, the ports that represent critical issues for the surrounding commu- 4.0/). nities could be manifold; however, there are very few assessments of citizens’ exposure to

Environments 2021, 8, 12. https://doi.org/10.3390/environments8020012 https://www.mdpi.com/journal/environments Environments 2021, 8, 12 2 of 16

port noise at the moment. Without proper management and with the expected growth in traffic, the impact of noise will only become worse in the years to come. Excessive noise emissions and consequent complaints from citizens could also compromise the natural growth of maritime traffic. In fact, nowadays, it is finally clear that prolonged exposure to noise can affect human health in a direct or indirect way. Direct effects can even cause permanent hearing loss; they occur when the sound pressure levels exceed 75 dB(A), but the effects on subjects depend on the duration of exposure and the sensitivity of the individual. Prevention of direct effects is a success of previous decades, and exposure is far below the direct effect threshold, except for cases in work environments [6]. However, below this threshold is where indirect effects on health can occur, which are equally important in cases of prolonged exposure. Student learning disabilities due to reduction in speech intelligibility in the classroom [7], hypertension and cardiovascular disease [8], sleep disturbance [9], and annoyance [10] are the most important indirect (or nonauditory) health effects of noise pollution. In order to prevent such effects, the scientific community has extensively studied the most impacting sources on land, which are the major transportation infrastructure and the industries. Road and railway traffic and airports have received a large amount of attention from the scientific community in all aspects, from their noise generation mechanisms [11–13] to their propagation; the mapping of their impact on land and the population [14,15]; and their mitigation with innovative solutions, such as low-noise pavements made of recycled materials [16,17], real time monitoring systems [18,19], and sustainable mitigation solutions [20–22]. The marginalization of port noise with respect to the major sources of infrastructure starts at the regulatory level, which is never properly treated and excluded from the strategic noise maps required by the European Noise Directive (END) [23] only for the main roads, railways, airports, and urban centers. As a consequence, ports have been poorly studied in the past, and only in recent years, some studies or projects concerning noise impact have been conducted [24–26]. Aiming at the acoustic characterization of a ship’s sources, several authors studied noise emitted at berths [27–29], while our previous work dealt with small and large vessels in movement [30,31]. In addition to ships, many different sources (cranes, forklifts, reach stackers, etc.) have different functions in ports, and they should all be included in a proper acoustical description of the port area and noise exposure assessment, which are generally performed with a noise map of the studied area. The acoustic mapping phase is not helped by this status of infancy in which the acoustics field of study in ports lies. In fact, in order to properly define outputs, a noise model needs precise inputs, i.e., the best acoustical characterization of the sources. In order to improve this situation, the INTERREG Maritime programme [32] addresses the problem of port noise from different points of view through a set of projects. Precisely, because the present literature is poor and still in its early stages, the projects need to act quickly, outlining the guidelines for acoustic mapping in port environments. Such a result will allow all ports to be held to the same standard, and their results would also be comparable. After introducing the INTERREG Maritime programme, the present paper explores the issues in the acoustic characterization of a port area through the authors’ in-field experience and from the analysis of the scientific literature. Generally, inhabited areas close to operational ones, many and different noise sources, connected road and rail traffic and the lack of specific regulations are the most frequent obstacles. This analysis shows that a proper acoustical characterization of the main sources acting in ports is still an unsolved task because of the many different sources and the issues arising when measuring in such a complex environment with non-negligible background noise. The present work therefore analyzes all the noise sources present in a port environment that must be considered for developing acoustic map properly, with the aim of defining the inputs that reduce the uncertainties on the output of the model. At first, sources are divided into macro-categories based on their characteristics, and, then, are further subdivided Environments 2021, 8, 12 3 of 16

following different criteria, such as their activity mode or location. This classification would be useful for competent authorities to properly assign responsibilities of noise exceedances and then find the most impacting activities, in order to develop appropriate noise mitigation actions. Further studies aimed at defining specific measurement protocols of noise produced by sources would benefit the division into categories.

2. INTERREG Maritime Programme The INTERREG Maritime programme Italy-France 2014–2020 was conceived to fill the knowledge gap regarding port noise. Different projects are being simultaneously carried out in order to describe the current state-of-the-art and pinpoint the best practices in terms of long-term sustainability in the north Tyrrhenian area. The projects currently approved, aiming to assess different aspects of the port noise, are: • RUMBLE: aims to realize noise reduction infrastructure in big ports. • MON ACUMEN: has the objective of developing a common monitoring system on the North Tyrrhenian ports; • REPORT: aimed to develop simulation models, noise evaluation, and noise control strategies producing guidelines; • DECIBEL: aims at the realization of infrastructure for noise reduction in small ports; • L.I.S.T. PORT: has the purpose of developing logistics and management models for lightweight and heavyweight vehicle traffic from and to the ports. The partners involved in this acoustic cluster of projects are: • Three Italian universities (the University of Cagliari, University of Genoa, University of Pisa), • One French university (University of Corsica Pasquale Paoli), • The Italian region of Liguria, two municipalities associations (ANCI Liguria, ANCI Toscana) • The port authorities of the involved Italian ports (Cagliari, Genoa, La Spezia, , Portoferraio) • The Environmental Protection Agency of Tuscany region (ARPAT), two municipalities (Nice Côte D’azur, Olbia), • Two French Chambers of Commerce and Industries (Nice, Bastia), • The French research center CSTB, the Corsica’s Transports Office. At the end of the research activities, the REPORT project will aggregate all the results reached in all the different projects to summarize and capitalize them. The results presented in this paper are obtained by means of the efforts carried out during the three projects involving big ports, i.e., RUMBLE, MON ACUMEN, and REPORT. RUMBLE is a French acronym that stands for “Noise reduction in large port cities in the cross-border maritime programme”. The programme aims at reducing noise emission of ports and logistics infrastructure, developing noise reduction infrastructure in large ports. Analyzing the state of the art in port noise in terms of available technologies and citizens’ perception of port noise represents the first step of this programme. In collaboration with MON ACUMEN and REPORT, a common questionnaire was then established, to collect all the available data on port noise in the area of interest, and to perform an investigation on local citizens’ perception of port noise. Then, after ante-operam monitoring campaigns, the infrastructure was built, and post-operam noise monitoring campaigns are going to be conducted to evaluate the obtained benefits. MON ACUMEN is an acronym for “MONitorage Actif Conjoint Urbain-MaritimE de la Nuisance” (Collective Active Monitoring of Urban and Maritime Noise). The aim of this project is tackling noise monitoring and noise management in the port area, in order to allow port authorities to manage port activities in a sustainable way. The project started with an in-depth analysis of the state-of-the-art concerning port noise, noise monitoring, noise measurement, and acoustic characterization of port-specific noise sources. Noise maps of the involved ports are needed to correctly design the monitoring infrastructure. Environments 2021, 8, 12 4 of 16

More specifically, a relation between the different port activities and noise levels at the receivers would allow the project to correctly pinpoint the monitoring position. The goal is to build an integrated monitoring system following common rules for all the ports in the area, which allows real-time simultaneous monitoring of noise in all the ports and, in the case noise exceeds the limits, assess the responsibilities. Compared to the projects described above, REPORT approaches the issue of port noise from a more theoretical perspective, aiming to develop models that lead to a better under- standing of the phenomenon. In particular, the project focuses on the following models: • modelling ships as a noise source and development of an integrated tool capable of handling ship noise in a similar way as railways noise and road noise in MithraSIG; • development of a neural network specialized in traffic flow analysis capable of per- forming real-time prediction of noise levels based on traffic flow and traffic composi- tion data; • analysis of the newest propulsion technologies (viz.: electric, hybrid, fuel cell and liquified natural gas) in terms of noise reduction when adopted by handling units in port areas and estimation of global noise reduction based on the total adoption of those technologies; • econometric evaluation of social costs generated by noise pollution in the port area which, excluding the last one, are all in the validation stage. The validation of the noise model in port areas will be followed by a final document, which will present all the results produced during the INTERREG Maritime programme.

3. Noise Issues around Ports The present section reports the criticalities in a port environment from an acoustical point of view by means of international published works or authors’ direct experiences in some important ports in the . The main issues about port noise can be summarized in four bullets points: • proximity of urban areas to noisy areas, • countless sources that also differ in terms of emissions, • traffic related to port operations, • lack of specific regulations. Paschalidou et al., in 2018, [24], described the port area of Piraeus (Greece) as a complex environment that made a complete representation of the noise environment all but impossible. The authors also underlined the simultaneous and conflictual presence of other big transportation infrastructure and industrial activities. This is an example of the underlying complexity of port noise mapping, which should include all the types of sources required by the END. The Greek work reported the presence of human settlements in the surroundings, without exploring the subject in depth; however, this clearly complicates the situation even further and may potentially lead to annoyance of the population. Still, Paschalidou et al. pointed out that the impact of port activities like container shipping and shipyards can propagate at long distances due to the heavy vehicle traffic flow. A similar scenario has been described by Schenone, et al. in 2016 with the outcome of the MESP project [33], focusing on some important ports of the Mediterranean Sea like Patrasso (Greece) and Tripoli (Libya). Most of the studied ports present the same shortcomings: “( ... ) if not well planned and managed, they (ports) can also represent a health threat for citizens living in the surrounding area. In fact, an improper and unsustainable management and development of ports usually mean difficult relationships with urban areas in terms of land use, pollution and citizens’ quality of life”. Moreover, Schenone, et al. [33] in a study carried out for reducing noise in the port of Tripoli, paid attention mainly to the noise produced by vehicles/machinery specifically used in a port environment, suggesting the maintenance of ports’ equipment such as cranes, forklifts, but also trucks and vehicles. Only road traffic noise was assessed and mitigated Environments 2021, 8, 12 5 of 16

with the application of sound absorbing asphalt, speed limit signs along the roads, ban on honking, speed bumps, and cross-roads. However, besides road traffic, a wide multitude of noisy industrial activities is usually present in port areas, from shipbuilding to oil and gas industries, grain storage facilities, paper processing, and many others. The presence of industrial plants contributes in two different ways to the level of complexity: adding more traffic inside and outside the port boundaries and adding more noise sources in the area, which includes machinery and load/unload vehicles. Major transport infrastructure near the port areas are usually built around the port, since the port itself often acts as a transport hub where all terrestrial lines converge on their way to seaways. In the last years, efforts have been made to promote intermodality [34], with the aim of reducing the environmental impact of international trade. In medium and long distances, the implementation of intermodality generally promotes the use of maritime transportation instead of rails and roads: as a result, even more terrestrial traffic will be directed towards the ports. A recent measurement campaign performed by Alsina-Pagès et al. [35] acknowledged the need of an acoustic monitoring in the port of Barcelona, concluding in a consequent work [36] that: “Ports and harbours are logistic nodes characterized by several types of noise, which can usually occur in a concurrent manner in the same harbour premises: , cruises, fishing and trade ships coexist with other industrial and auxiliary services”. As already stated, ports are also usually surrounded by urban settlements. Therefore, many inhabitants may be exposed to port noise, either directly or indirectly due to terrestrial traffic induced by the port. Moreover, port activities yield a significant impact on noise even at night [37], when human activities in the city usually decrease. The lower background noise means that noise from the port area is even more significant, and influences the soundscape at greater distances. Murphy and King [38] studied noise exposure of citizens living in the vicinity of Dublin port. Their results showed that citizens were exposed to noise higher than the limits suggested for night-time exposure [39], with a significant low frequency content. Finally, ships represent a distinctive noise source in the port area and are very variable in terms of size, sound power, and sound spectrum. Loading and unloading operations must be considered in order to properly assess noise emission by ships. The Eco.Port Project reports that the main difficulty found during the characterization of vessel noise emission was the correct evaluation of the background noise, which was heavily influenced by the noise emitted by the urban activities around the ports and the canals of Venice [40]. The study of noise produced by ships is very challenging and requires a specific characterization for each phase occurring during their stay in port environment: moving; maneuvering, mooring, and ground operations. Furthermore, each single ship category has a series of peculiar operations and can emit in different ways, making it impossible to generalize the results. Studies have been dedicated to moored ships, to noise from machinery propagating through hull vibrations, aerodynamic noise produced by funnels, heating and ventilation systems [28,29,41,42]. However, less attention has been paid to cranes or loading/unloading operations. Moreover, noise from moving ships has been studied [43–45], but a proper characterization of vessel noise emission divided into categories has been only reported during the last year [30,31]. As underlined by authors from different parts of the world, the lack of specific regulations regarding noise management in port areas appears to be a common denominator [46–51]. To sum up, the port area presents many critical aspects, such as the high number of sources operating in the port area that work continuously and in a random pattern, the traffic induced by port activities that produces noise far away from the port boundaries and mixes with regular traffic. All these issues have also emerged in the seven ports of the North Tyrrhenian Sea ports involved in the projects Rumble, Report, and Mon Acumen. Excluding the port of Portoferraio, the involved ports are some of the most important ports Environments 2021, 8, x FOR PEER REVIEW 6 of 17

studied [43–45], but a proper characterization of vessel noise emission divided into cate- gories has been only reported during the last year [30,31]. As underlined by authors from different parts of the world, the lack of specific regu- lations regarding noise management in port areas appears to be a common denominator [46–51]. To sum up, the port area presents many critical aspects, such as the high number of sources operating in the port area that work continuously and in a random pattern, the Environments 2021, 8traffic, 12 induced by port activities that produces noise far away from the port boundaries 6 of 16 and mixes with regular traffic. All these issues have also emerged in the seven ports of the North Tyrrhenian Sea ports involved in the projects Rumble, Report, and Mon Acumen. Excluding the port of Portoferraio, the involved ports are some of the most important ports of Italy andof Italy France and and, France of course, and, of of course, the entire of the Mediterranean entire Mediterranean Sea. Figure Sea. 1 shows Figure 1 shows the the positions andpositions affiliations and affiliations of the ports of on the a portsmap. on a map.

Figure 1. FigureInvolved 1. Involved ports in the ports three in the INTERREG three INTERREG Maritime Mari programmetime programme projects Rumble, projects Report,Rumble, and Report, Mon Acumen. and Mon Acumen. Port noise in Bastia, La Spezia, Livorno, and Cagliari are going to be mapped as part of Port noisethe in MONBastia, ACUMEN La Spezia, project. Livorno, These and ports Cagliari are surrounded are going to by be a mapped dense urban as part environment and of the MON ACUMENimportant project. urban roadThese arteries ports are are surrounded right between by thea dense port urban areas andenvironment the cities. Furthermore, and importantthree urban of road them arteries also have are railways, right between mostly the used port for areas freight and transportation. the cities. Further- Other ports in the more, three of projectthem also show have very railways, similar mostly characteristics, used for freight in particular transportation. the port ofOther Genoa, ports in which all the in the project criticalitiesshow very aresimilar present characteristics, in an evenworse in particular scenario. the The port port of ofGenoa, Genoa, in involvedwhich in REPORT all the criticalitiesand RUMBLEare present projects, in an even is the wo mostrse scenario. important The port port of of the Genoa, area in involved terms of in passengers and REPORT and RUMBLEfreight flux projects, and one is ofthe the most most impo importantrtant port ports of the of thearea Mediterranean in terms of passen- Sea. Moreover, the gers and freightentire flux cityand of one Genoa of the is most surrounded important by theports borders of the ofMediterranean the port and theSea. slopes More- of the Ligurian over, the entireApennines city of Genoa mountains, is surrounded a favorable by the condition borders for of thethe propagationport and the andslopes reflection of of sound the Ligurian Apenninesrays. As a consequence,mountains, a thefavorabl populatione condition is even for more the propagation exposed to port and noise. reflec- National roads tion of sound andrays. railways As a consequence, infrastructure the arepopu alsolation present is even between more theexposed port andto port the noise. city. National roads andIndustrial railways infrastructure plants are present are inalso almost present every between port involved the port inand the the project. city. As examples Industrialof plants the critical are present issues in of almost ports withevery many port industrialinvolved in and the operational project. As areasexam- with different ples of the criticalmachinery issues of (noise ports with sources) many and industrial surrounded and operational by inhabited areas areas, with Figures different2 and3 report machinery (noiseGenova sources) and and Livorno surrounded maps with by theinhabited area marked areas, Figures according 2 and to their 3 report use. Ge- nova and Livorno maps with the area marked according to their use.

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Figure 2. The complex scenario of the city of Genoa, where the port area is completely surrounded FigureFigure 2. The 2. complex The complex scenario scenario of the of city the of city Genoa, of Genoa, where wh theere port the area port is area completely is completely surrounded surrounded by the city. by the city. by the city.

Figure 3. The complex scenario of the city of Livorno, where the port area is completely sur- FigureFigure 3. The 3. complex The complex scenario scenario of the cityof the of city Livorno, of Livorno, where where the port the area port is area completely is completely surrounded sur- by the city. rounded by the city. rounded by the city. 4. Classification of Noise Sources in Ports 4. Classification of Noise Sources in Ports 4. Classification of ThisNoise section Sources summarizes in Ports the fundamental elements for producing an accurate noise This section summarizes the fundamental elements for producing an accurate noise This sectionmap, summarizes which is an the accurate fundamental 3D model elements of the studyfor producing area, a database an accurate including noise all the involved map, which is an accurate 3D model of the study area, a database including all the in- map, which is noisean accurate sources 3D and, model of course, of the an study acoustical area, a classification database including of the main all the noise in- sources in the volved noise sources and, of course, an acoustical classification of the main noise sources volved noise sourcesarea. The and, first of subsectioncourse, an describesacoustical the classification basic requirements of the main shared noise by sources all kinds of noise map, in the area. The first subsection describes the basic requirements shared by all kinds of in the area. Thewhile first thesubsection second one describes reports th thee basic division requirements of port noise shared sources by intoall kinds categories. of noise map, while the second one reports the division of port noise sources into categories. noise map, while the second one reports the division of port noise sources into categories. 4.1. Base Information for the 3D Model

A comprehensive 3D model of the area is the basic ingredient for accurate noise mapping. The information needed should be well known to the Port authorities and they are usually able to provide it, although it may not be up to date.

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A simple clustering of the geographical data could be performed as follows: • morphological data; • topographical data; • buildings. Elevation points and isohypses are key points for building the Digital Terrain Model (DTM). A correct DTM is useful for a precise calculation of noise propagation, as well as for a proper positioning of buildings and sources. For example, roads and railways sometimes are only provided on a two-dimensional map, which then must be perched on the DTM. Instead, infrastructure maps can be directly included in the DTM when they also have elevations. Thus, three-dimensional elements that could interfere with sound propagation must be included in the noise map project and they should be carefully perched on the DTM. The following data must be gathered and carefully reviewed: • residentials and industrials buildings including their height; • sensitive receivers (school, hospitals); • obstacles such as acoustical barriers, stacks of containers and similar. The number of inhabitants in each residential building, as well as the number of students in schools and patients in hospitals, should be retrieved in this phase, for the purpose of drafting an action plan. In fact, eventual noise exceeding limitations, together with the direct comparison with noise maps results and local noise limits would be used with inhabitant’s data in order to get the priority index for the action plan activities. Traffic flow data and other data must be acquired for transport infrastructure. A summary of the elements needed is reported in Table1.

Table 1. Input data for the 3D model.

Geographical Element Needed for DTM Sound Sources Receivers Propagation Elevation points and isohypses Yes X Residential and industrial No X X buildings Obstacles No X Roads If provided with elevations X Railways If provided with elevations X Industries X X Land usage (Corine land cover) X

4.2. Macro-Categories Subdivision of Noise Sources The very first division of noise sources in the port area belongs to the NoMEPorts project [52], where the possible sources were divided into “industrial” or “traffic-related” categories. On the basis of the experience acquired with the analysis of the state of the art of port noise [47], a refined classification is here proposed. The authors found that including in one big group all the sources different than roads and railways is not adequate since noise produced by very different activities or sources, would fall in one category such as: • ships noise: moving or moored; • noise produced by the plethora of industrial plants that usually are present in a port area; • noise produced by the port activities: loading and unloading operations, container handling, boat service operations, etc. Most importantly, when excessive noise occurs, the right responsible should act to mitigate it. Thus, having all the three classes of sources included in different groups makes Environments 2021, 8, 12 9 of 16

the task of assigning the responsibility easier. Even in this regard, a finer resolution of the class can help in correctly identifying the responsibilities. The relevant macro-categories are defined as: • road sources; • railways sources; • ship sources; • port sources; • industrial sources. In order to perform a finer attribution of responsibilities, a further geographical differ- entiation has been set starting from the fact that a port area is, by its nature, surrounded and penetrated by other transport infrastructure. While road or railway traffic inside the port boundaries is obviously related to the port activities, outside the boundaries, the port related traffic mixes with the regular one. Thus, even if it can be difficult, the following differentiation is required for both road and railways traffics: • internal traffic; • port related external traffic; • external traffic not generated by port. At first, for both roads and railways traffic, a single map including all the three components can be produced, but if criticalities arise, the proposed differentiation should be performed and will allow the evaluation of possible port responsibilities. A deeper description of the proposed groups is presented in the following subsections.

4.2.1. Roads Sources As discussed before, the traffic flow is divided into three components. The internal traffic could be estimated through flow monitoring at the gate, but the external traffic related to the port could be more difficult to evaluate properly. A traffic monitoring campaign is therefore suggested, but if it is not possible for economical or practical reasons, a traffic model could be applied starting from the gate flow data to estimate the flow distribution on the road network. In any case, the starting point could be a map including Environments 2021, 8, x FOR PEER REVIEWall the subclasses is required and specific maps should only be produced after the eventual10 of 17 emergence of noise criticalities. Figure4 reports examples of road traffic complexity in port areas, where heavy freight flows merge with passengers from ferries and normal traffic.

Figure 4. Examples of road traffic complexity in port areas. Figure 4. Examples of road traffic complexity in port areas.

Figure 5. Examples of railway traffic complexity, including freight trains operations.

4.2.3. Ship Sources All the activities related to movement and stationing of ships fall in this category. In the MON ACUMEN protocol, it is then asked to provide sound powers of the ship sources in the two different operational phases for the following categories: • Ferries; • Roll-on/roll-off; • Container ships; • Cruises; • Chemical tankers; • Tankers; • Pilot boats;

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4.2.2. Railways Sources A similar approach to the one used for road sources is used for railways. The main difference is that trains can have a more precise differentiation between port-related and non-port-related traffic. For example, if a port does not present a passenger train station inside its premises, the entire passenger traffic could be considered not related to the port. Moreover, the railway network is likely simpler compared to the road one. For this kind of source, literature is rich and the requirements are the same for a railway noise map. However, differences from standard cases are possible due to the high percentage of freight Figuretrains 4. in Examples industrial of ports,road traffic as reported complexity in the in port examples areas. of Figure5.

Figure 5. Examples of railway traffic complexity, including freight trains operations. Figure 5. Examples of railway traffic complexity, including freight trains operations. 4.2.3. Ship Sources 4.2.3. Ship Sources All the activities related to movement and stationing of ships fall in this category. AllIn thethe MONactivities ACUMEN related protocol,to movement it is then and askedstationing to provide of ships sound fall in powers this category. of the ship sourcesIn the in theMON two ACUMEN different operationalprotocol, it is phases then as forked the to following provide sound categories: powers of the ship sources in the two different operational phases for the following categories: • Ferries; • • Ferries;Roll-on/roll-off; • • Roll-on/roll-off;Container ships; •• ContainerCruises; ships; •• Cruises;Chemical tankers; •• ChemicalTankers; tankers; •• Tankers;Pilot boats; •• PilotTugboats. boats; The reason behind this choice is simply due to the technical differences between the different classes of ships. Moreover, the difference in the transported material will differentiate the loading and unloading procedures and, therefore, the noise emission. E.g., cruises interest mainly passenger traffic, which will lead to higher levels of induced terrestrial road traffic due to the passengers approaching the port area but will generate low levels of noise in the embarkation phase. On the contrary RoRo load and onload phases are characterized by high levels of trucks and cars right into the ships while ferries stay in between the two with a mix of passengers and trucks rolling on and off the ships. Container ships are completely different because only their loading and unloading phases involve containers only, thus they are characterized by containers impact noises, crane and vehicle warning alarm noises, and container deployment vehicles noise. However, all the loading Environments 2021, 8, x FOR PEER REVIEW 11 of 17

• Tugboats. The reason behind this choice is simply due to the technical differences between the different classes of ships. Moreover, the difference in the transported material will differ- entiate the loading and unloading procedures and, therefore, the noise emission. E.g., cruises interest mainly passenger traffic, which will lead to higher levels of induced ter- restrial road traffic due to the passengers approaching the port area but will generate low levels of noise in the embarkation phase. On the contrary RoRo load and onload phases are characterized by high levels of trucks and cars right into the ships while ferries stay in between the two with a mix of passengers and trucks rolling on and off the ships. Con- Environments 2021, 8, 12 tainer ships are completely different because only their loading and unloading phases11 of in- 16 volve containers only, thus they are characterized by containers impact noises, crane and vehicle warning alarm noises, and container deployment vehicles noise. However, all the loadingand unloading and unloading operations operations are included are included in port sourcesin port sources categories. categories. Different Different kinds of kinds ships ofand ships operations and operations are reported are reported in Figure in6 Figureas examples. 6 as examples.

Figure 6. Examples of types of ship, including containers, RoRo, pilot boats, and a canal city view. Figure 6. Examples of types of ship, including containers, RoRo, pilot boats, and a canal city view. Noise emission from moored ships mainly refers to engines, funnel, and ventilation, Noise emission from moored ships mainly refers to engines, funnel, and ventilation, as well as transits in port regimes. The categorization is mainly based on the type of the as well as transits in port regimes. The categorization is mainly based on the type of the ships. Moreover, the tonnage is linked to the tugboats used for the ship maneuvering. ships. Moreover, the tonnage is linked to the tugboats used for the ship maneuvering. Container racks are generally bigger than ferries and Ro-Ros, so they generally need to be Container racks are generally bigger than ferries and Ro-Ros, so they generally need to be maneuvered with the help of one or more tugboats, while smaller boats may be moored maneuveredwithout the supportwith the ofhelp tugboats. of one or Ignoring more tugboats, the presence while ofsmaller the tugboats boats may can be lead moored to an withoutunderestimation the support of theof tugboats. total emission Ignoring of the the ship presence sources of group.the tugboats can lead to an un- derestimationFor those of reasons, the total a emission noise emission of the ship characterization sources group. during the different phases of operationFor those is needed reasons, for a all noise kinds emission of ships. characterization during the different phases of operationOnly is the needed ships for that all yield kinds a significantof ships. contribution to noise, i.e., the noisiest or most frequent,Only shouldthe ships be considered.that yield a Thissignificant would contribution include all the to commercial noise, i.e., the and noisiest passenger or most ships frequent,like RoRo, should cruises, be containerconsidered. ships, This tankers, would andinclude so on. all Smallerthe commercial vessels like and recreational passenger shipscrafts, like law RoRo, enforcement cruises, vessels,container and ships, fishing tank boatsers, and should so on. be consideredSmaller vessels only like if explicitly recrea- tionalrequired crafts, or when law enforcement a particular disturbancevessels, andemerges fishing boats locally. should In fact, be while considered their low only number if ex- plicitlycurrently required does not or when represent a particular an issue disturbance for cities like emerges Livorno locally. [30], waterIn fact, transport while their system low numbercould represent currently andoes issue not forrepresent coastal an or issue riverfront for cities cities, like suchLivorno as Hamburg,[30], water Bordeaux,transport systemAmsterdam, could and represent Venice inan the issue form for of coastal water taxi, or riverfront water bus cities, or private such boats as Hamburg, noise pollution. Bor- deaux,In these Amsterdam, cities, water and transport Venice canin the be form considered of water as taxi, a stand-alone water bus or category private forboats a proper noise assignment of responsibilities in case of noise exceedance. Considering the population of the ports under study, small vessels are excluded in order to avoid scattering efforts into secondary aspects that would poorly contribute to the total noise emissions [43]. As an example, taking into account the recreational crafts will require long-term noise measurement that are not compatible with the requirements of the projects and, moreover, their noise emission will likely be negligible compared to commercial and passenger ships. Noise produced by moving and/or stationary sources should be properly divided according to its type. In order to properly implement a single type of ship, different noise sources must be created on the digital model of the port. However, its noise emission can widely vary, based on the chimney elevation, the positioning of the cooling systems’ vents, and obviously, it can vary from type to type. Environments 2021, 8, x FOR PEER REVIEW 12 of 17

pollution. In these cities, water transport can be considered as a stand-alone category for a proper assignment of responsibilities in case of noise exceedance. Considering the population of the ports under study, small vessels are excluded in order to avoid scattering efforts into secondary aspects that would poorly contribute to the total noise emissions [43]. As an example, taking into account the recreational crafts will require long-term noise measurement that are not compatible with the requirements of the projects and, moreover, their noise emission will likely be negligible compared to commercial and passenger ships. Noise produced by moving and/or stationary sources should be properly divided according to its type. In order to properly implement a single type of ship, different noise sources must be created on the digital model of the port. However, its noise emission can Environments 2021, 8, 12 widely vary, based on the chimney elevation, the positioning of the cooling systems’12 of 16 vents, and obviously, it can vary from type to type.

4.2.4.4.2.4. Port Port Sources Sources ThisThis category includesincludes allall the the sources sources directly directly employed employed in port-relatedin port-related activities, activities, such suchas: as: • • loadingloading and and unloading unloading of of freight freight trains; trains; • • loadingloading and and unloading unloading of of ships; ships; • • serviceservice operations. operations. ExamplesExamples of of these these activities are container loading/unloading from from container container ships, ships, refueling,refueling, boarding boarding and and landing landing of of vehicles vehicles due due to to RoRo RoRo vessels, vessels, and and containers containers load- load- ing/unloadinging/unloading on on freight freight trains. trains. ExamplesExamples of of port port sources sources are are reported reported in in Figure Figure 77..

FigureFigure 7. 7. ExamplesExamples of of port sources. On top, a wide-anglewide-angle viewview ofof a a quay quay in in the the port port of of Livorno Livorno where wherecan be can seen be containers,seen containers, a containership a containership and multipleand multiple cranes; cranes; on the on centerthe center a view a view of a of containers a con- tainersquay. Onquay. the On bottom, the bottom, three imagesthree images from thefrom Livorno the Livorno port, fromport, leftfrom to left right: to right: a portal-crane a portal-crane near a nearcontainership, a containership, a reach a stackerreach stacker carry acarry container a container and a mobileand a mobile crane. crane.

AA further further subdivision subdivision is isnecessary necessary to toproperly properly describe describe the thesources sources in such in sucha big aclas- big sificationclassification from from an acoustic an acoustic point point of view. of view. The criteria The criteria can be can whatever be whatever it is moving it is moving or is fixed.or is fixed.While Whilefixed sources fixed sources are mainly are mainly represented represented by cranes, by cranes,even if evenof different if of different types, types, movable noise sources working in port areas include a huge variety of vehicles or machinery. The most important of which are straddle carriers, front lifts, contstacker, fork lifts, transtainers, moving cranes, dock tractors, and other cargo handling units. Moreover, the sources included in this category perform different activities that corre- spond to different sound emissions. Hence, a unique definition is not sufficient for these sources, which can be characterized by different operational phases that can be grouped into three categories, each of them having different noise emission characteristics: • transit; • handling; • loading/unloading operations. For each category and phase, a proper measurement campaign aimed at their assess- ment is needed. Environments 2021, 8, 12 13 of 16

4.2.5. Industrial Sources All the remaining industrial sources are included in this category, which can be easily described. However, gathering all the information and completing the task with sufficient detail can be very complex. In fact, many industrial sites or activities are close to the port area and they can perform every kind of activity. Thus, many different kinds of noisy machinery can be present. As a first approximation, it is recommended to place utmost care to external sources such as vehicles and industrial machines employed in industrial activities, and to loading and unloading activities related to industries. Sources inside buildings can be included if looking at finer details, as it is not expected that their impact to the receiver would be significant in a port environment.

5. Discussion and Conclusions The assessment of noise produced by ports has become increasingly necessary because of increase in both passengers and freight maritime traffic. Furthermore, lack of control policies and specific regulations have allowed, over the years, the growth of noisy structures around the ports, such as power plants, logistic centers and industries. The first part of the present paper dealt with the analysis of the literature, combined with the experience gained by the authors in the INTERREG Maritime programme Italy-France 2014–2020. The results highlighted that the increased activities and/or territorial expansion of some ports has led to urban areas too close to noisy environments. To date, only some complaints arose from citizens living near ports, but an increase is expected in the future if the right attention will not be immediately paid to port noise. The INTERREG Maritime programme aims at improving the knowledge on port noise through a set of different projects. Among all, RUMBLE aims to realize noise reduction infrastructure in big ports, MON ACUMEN has the objective of developing a common monitoring system on the North Tyrrhenian ports, and REPORT aims at developing simulation models, noise evaluation, and noise control strategies. The acoustic mapping phase is the first fundamental step for the assessment of citizens’ exposure to noise and its eventual mitigation. MON ACUMEN is also conceived to produce the noise maps of all the ports involved in the project. In the analysis of noise issues around port areas, the present work focused on showing the lack of studies concerning noise mapping of port areas within the current scientific literature. Very few studies have been dedicated to port noise, mainly because it is difficult and challenging from a characterization and measurements points of view. In fact, this work has shown that there are problems of technical nature, in addition to the lack of specific regulations and the proximity of inhabited areas to noisy areas. The very definition of a port area is a difficult task, given that many activities add to the quays and the load- ing/unloading areas. Examples are intermodal hubs and all transportation infrastructure, which can also be located at considerable distances from the coast. The main difficulty lies in the size of ports and in the large number and variety of sound sources they host. The possible sources of noise that can be found in a port range from ships in transit, to stationary ships, generators, maneuvering equipment, cranes, machinery and ventilation systems, but also moving vehicles and trains. Some of these sources have been the object of specific studies, but many others have been overlooked and their different mechanisms of sound generation require specific attention. Moreover, it is often difficult to carry out the census of noisy industrial machinery, given that companies with different internal policies on environmental pollution can be within the territory managed by the port authorities. In addition, both road and rail traffic relating to the port area mix with local traffic, and therefore particular attention is needed when separating the contributions. After these observations, it is now clear how insufficient previous methods present in the literature, which defined a port noise model based on only two categories of sources: industrial and traffic. Environments 2021, 8, 12 14 of 16

In the present work, after summarizing the basic information requested for the 3D model, the classification of noise sources has been extended to five macro categories, each of different nature or use: road, railways, ship, port, and industrial sources. Each of them has further subdivisions according to their working operation mode or position. Road and railway traffic are divided into internal, port-related external and external not generated by port traffic. Ship noise is divided into movement and moored phases for all the different categories of ships, among which the most impacting are recognized in ferries, RoRo, container ships, cruises, chemical tankers, tankers, pilot boats, and tugboats. Port and industrial categories include the majority of sources and, generally, they can contain the same types of sources. For example, straddle carriers, front lifts, contstacker, forklifts, transtainers, moving cranes, dock tractors, and other cargo handling units can be used for industrial purposes as well as port activities. However, port sources include all those acting during loading and unloading of freight trains and ships or during ship’s service operations. Further subdivisions classify the sources into fixed or movable and according to their operational phases, e.g., transit, handling or loading/unloading operations. A more detailed classification would help the competent authorities to correctly identify responsibilities of noise emission and noise exposure of citizens, a task that is not obvious in such a complex environment. Moreover, the proposed source classification suggests an analytical approach in the identification of the most suitable position for the sound level meters in the MON ACUMEN project. In fact, a critical aspect that emerged from this study is the definition of the positions of a noise monitoring system aimed at identifying the source responsible for citizens’ complaints and at correlating the port activities to noise. If performed correctly, this monitoring could lead to the definition of the relationships between non-acoustic parameters, such as the tonnage of bulk goods exchanged or the total number of passengers, with the average annual noise emission of the infrastructure. Finally, the main use of this classification is to favor the definition of specific mea- surement procedures for the sound characterization of the sources. In fact, while the road and railways are well-known noise emitters, nautical sources still require attention from the scientific community. Towards the final goal of defining guidelines for the acoustic mapping in port environments, a detailed classification of the source, i.e., a better definition of the model’s inputs, will lead to better outputs and a more precise evaluation of noise exposure. At the end, developing a common strategy will allow all ports to be aligned to the same standard and the noise maps produced will be comparable. The characterization of the noise emission of all the sources during their different phases of operation is underway and future work will also address it.

Author Contributions: Conceptualization, L.F.; Data curation, L.F. and M.B.; Formal analysis, L.F. and M.B.; Funding acquisition, F.F. and G.L.; Investigation, L.F. and M.B.; Methodology, L.F. and G.L.; Project administration, F.F.; Resources, G.L.; Supervision, F.F. and G.L.; Validation, F.F.; Writing— original draft, L.F.; Writing—review & editing, M.B. and F.F. All authors have read and agreed to the published version of the manuscript. Funding: This work was supported by the funding from the European Union’s INTERREG IT-FR “Maritime” Programme (RUMBLE: G36H17000000007, MON ACUMEN: B52H17000770003, REPORT: D36C18000220006). Institutional Review Board Statement: Not applicable. Acknowledgments: The authors thank Lara Del Pizzo for linguistic support and proofreading of the article. Conflicts of Interest: The authors declare no conflict of interest. Environments 2021, 8, 12 15 of 16

References 1. Review of Maritime Transport, UNCTAD/RMT/2018. Available online: https://unctad.org/en/PublicationsLibrary/rmt2018_ en.pdf (accessed on 22 December 2020). 2. Rossi, E.; Licitra, G.; Iacoponi, A.; Taburni, D. Assessing the underwater ship noise levels in the North Tyrrhenian Sea. In The Effects of Noise on Aquatic Life II; Springer: New York, NY, USA, 2016; pp. 943–949. 3. Merchant, N.D.; Pirotta, E.; Barton, T.R.; Thompson, P.M. Monitoring ship noise to assess the impact of coastal developments on marine mammals. Mar. Pollut. Bull. 2014, 78, 85–95. [CrossRef][PubMed] 4. Erbe, C.; Marley, S.A.; Schoeman, R.P.; Smith, J.N.; Trigg, L.E.; Embling, C.B. The effects of ship noise on marine mammals—A review. Front. Mar. Sci. 2019, 6, 606. [CrossRef] 5. Fredianelli, L.; Nastasi, M.; Bernardini, M.; Fidecaro, F.; Licitra, G. Pass-by characterization of noise emitted by different categories of seagoing ships in ports. Sustainability 2020, 12, 1740. [CrossRef] 6. Basner, M.; Babisch, W.; Davis, A.; Brink, M.; Clark, C.; Janssen, S.; Stansfeld, S. Auditory and non-auditory effects of noise on health. Lancet 2014, 383, 1325–1332. [CrossRef] 7. Shield, B.M.; Dockrell, J.E. The effects of noise on children at school: A review. Build. Acoust. 2003, 10, 97–116. [CrossRef] 8. Stansfeld, S.A.; Matheson, M.P. Noise pollution: Non-auditory effects on health. Br. Med. Bull. 2003, 68, 243–257. [CrossRef] [PubMed] 9. Kawada, T. Noise and health—Sleep disturbance in adults. J. Occup. Health. 2011, 53, 413–416. [CrossRef][PubMed] 10. Guski, R.; Schreckenberg, D.; Schuemer, R. WHO environmental noise guidelines for the European region: A systematic review on environmental noise and annoyance. Int. J. Environ. Res. Public Health 2017, 14, 1539. [CrossRef] 11. Del Pizzo, A.; Teti, L.; Moro, A.; Bianco, F.; Fredianelli, L.; Licitra, G. Influence of texture on tyre road noise spectra in rubberized pavements. Appl. Acoust. 2020, 159, 107080. [CrossRef] 12. Pieren, R.; Heutschi, K.; Wunderli, J.M.; Snellen, M.; Simons, D.G. Auralization of railway noise: Emission synthesis of rolling and impact noise. Appl. Acoust. 2017, 127, 34–45. [CrossRef] 13. Tian, Y.; Wan, L.; Ye, B.; Yin, R.; Xing, D. Optimization Method for Reducing the Air Pollutant Emission and Aviation Noise of Arrival in Terminal Area. Sustainability 2019, 11, 4715. [CrossRef] 14. Licitra, G.; Fredianelli, L.; Petri, D.; Vigotti, M.A. Annoyance evaluation due to overall railway noise and vibration in Pisa urban areas. Sci. Total Environ. 2016, 568, 1315–1325. [CrossRef] 15. Wei, W.; Van Renterghem, T.; De Coensel, B.; Botteldooren, D. Dynamic noise mapping: A map-based interpolation between noise measurements with high temporal resolution. Appl. Acoust. 2016, 101, 127–140. [CrossRef] 16. Kleiziene,˙ R.; Šernas, O.; Vaitkus, A.; Simanaviˇciene,˙ R. Asphalt Pavement Acoustic Performance Model. Sustainability 2019, 11, 2938. [CrossRef] 17. Teti, L.; León, G.; Pizzo, A.; Moro, A.; Bianco, F.; Fredianelli, L.; Licitra, G. Modelling the acoustic performance of newly laid low-noise pavements. Constr. Build. Mater. 2020, 247, 118509. [CrossRef] 18. Wong, M.; Wang, T.; Ho, H.; Kwok, C.; Lu, K.; Abbas, S. Towards a smart city: Development and application of an improved integrated environmental monitoring system. Sustainability 2018, 10, 623. [CrossRef] 19. Zambon, G.; Benocci, R.; Bisceglie, A.; Roman, H.E.; Bellucci, P. The LIFE DYNAMAP project: Towards a procedure for dynamic noise mapping in urban areas. Appl. Acoust. 2017, 124, 52–60. [CrossRef] 20. Gori, P.; Guattari, C.; Asdrubali, F.; de Lieto Vollaro, R.; Monti, A.; Ramaccia, D.; Toscano, A. Sustainable acoustic metasurfaces for sound control. Sustainability 2016, 8, 107. [CrossRef] 21. Danihelová, A.; Nˇemec,M.; Gergel’, T.; Gejdoš, M.; Gordanová, J.; Sˇcensný, P. Usage of Recycled Technical Textiles as Thermal Insulation and an Acoustic Absorber. Sustainability 2019, 11, 2968. [CrossRef] 22. Fredianelli, L.; Del Pizzo, A.; Licitra, G. Recent developments in sonic crystals as barriers for road traffic noise mitigation. Environments 2019, 6, 14. [CrossRef] 23. Directive, E.U. Directive 2002/49/EC of the European parliament and the Council of 25 June 2002 relating to the assessment and management of environmental noise. Off. J. Eur. Communities L 2002, 189, 2002. 24. Paschalidou, A.K.; Kassomenos, P.; Chonianaki, F. Strategic Noise Maps and Action Plans for the reduction of population exposure in a Mediterranean port city. Sci. Total Environ. 2019, 654, 144–153. [CrossRef] 25. Murphy, E.; King, E.A. An assessment of residential exposure to environmental noise at a shipping port. Environ. Int. 2014, 63, 207–215. [CrossRef] 26. 16 Neptunes Project. Available online: https://www.neptunes.pro/ (accessed on 22 December 2020). 27. Di Bella, A.; Tombolato, A.; Cordeddu, S.; Zanotto, E.; Barbieri, M. In situ characterization and noise mapping of ships moored in the Port of Venice. J. Acoust. Soc. Am. 2008, 123, 3262. [CrossRef] 28. Santander, A.; Aspuru, I.; Fernandez, P. OPS Master Plan for Spanish Ports Project. Study of potential acoustic benefits of on-Shore power supply at berth. In Proceedings of the Euronoise 2018, Heraklion-Crete, Greece, 27–31 May 2018. 29. Badino, A.; Borelli, D.; Gaggero, T.; Rizzuto, E.; Schenone, C. Acoustical impact of the ship source. In Proceedings of the 21st International Congress on Sound and Vibration, Beijing, China, 13–17 July 2014; pp. 13–17. 30. Bernardini, M.; Fredianelli, L.; Fidecaro, F.; Gagliardi, P.; Nastasi, M.; Licitra, G. Noise assessment of small vessels for action planning in canal cities. Environments 2019, 6, 31. [CrossRef] Environments 2021, 8, 12 16 of 16

31. Nastasi, M.; Fredianelli, L.; Bernardini, M.; Teti, L.; Fidecaro, F.; Licitra, G. Parameters Affecting Noise Emitted by Ships Moving in Port Areas. Sustainability 2020, 12, 8742. [CrossRef] 32. INTERREG Marittimo-IT FR-Maritime. Available online: http://interreg-maritime.eu/ (accessed on 22 December 2020). 33. Schenone, C.; Pittaluga, I.; Borelli, D.; Kamali, W.; El Moghrabi, Y. The impact of environmental noise generated from ports: Outcome of MESP project. Noise Mapp. 2016, 1.[CrossRef] 34. Hanaoka, S.; Regmi, M.B. Promoting intermodal freight transport through the development of dry ports in Asia: An environmen- tal perspective. Iatss Res. 2011, 35, 16–23. [CrossRef] 35. Alsina-Pagès, R.M.; Socoró, J.C.; Barqué, S. Survey of Environmental Noise in the Port of Barcelona. In Proceedings of the Euronoise—European Conference on Noise Control, Crete, Greece, 27–31 May 2018. 36. Alsina-Pagès, R.M.; Socor, J.C.; Bergadà, P. The impact of man-made noise on the passenger transport stations of Port of Barcelona. In Proceedings of the INTER-NOISE and NOISE-CON Congress and Conference, Madrid, Spain, 16–19 June 2019; Institute of Noise Control Engineering: Reston, VA, USA, 2019; Volume 259, pp. 6912–6922. 37. Badino, A.; Borelli, D.; Gaggero, T.; Rizzuto, E.; Schenone, C. Acoustic impact of ships: Noise-related needs, quantification and justification. In Sustainable Maritime Transportation and Exploitation of Sea Resources, Proceedings of the 14th International Congress of the International Maritime Association of the Mediterranean, IMAM, Genoa, Italy, 13–16 September 2011; CRC Press/BalNema: Leiden, The Netherlands, 2011; Volume 2, pp. 961–969. 38. Murphy, E.; King, E.A. Residential exposure to port noise: A case study of Dublin, Ireland. In Proceeding of the 41st International Congress on Noise Control Engineering, New York, NY, USA, 19–22 August 2012. 39. Kim, R.; Van den Berg, M. Summary of night noise guidelines for Europe. Noise Health 2010, 12, 61. [CrossRef] 40. EcoPorts 2011. EcoPorts Project, Information Exchange and Impact Assessment for Enhanced Environmental-Conscious Opera- tions in European Ports and Terminals, FP5. Available online: http://cordis.europa.eu/project/rcn/87079_en.html (accessed on 22 December 2020). 41. Witte, J. Noise from moored ships. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings; Institute of Noise Control Engineering: Reston, VA, USA, 2010; pp. 3202–3211. 42. Di Bella, A.; Remigi, F. Prediction of noise of moored ships. In Proceedings of the Meetings on Acoustics ICA2013, Montréal, QC, Canada, 1–7 June 2013; Volume 19, p. 010053. 43. Badino, A.; Borelli, D.; Gaggero, T.; Rizzuto, E.; Schenone, C. Noise emitted from ships: Impact inside and outside the vessels. Procedia-Soc. Behav. Sci. 2012, 48, 868–879. [CrossRef] 44. Di Bella, A.; Remigi, F.; Fausti, P.; Tombolato, A. Measurement methods for the assessment of noise impact of large vessels. In Proceedings of the 23rd International Congress on Sound & Vibration, Athens, Greece, 10–14 July 2016. 45. Fausti, P.; Santoni, A.; Martello, N.Z.; Guerra, M.C.; Di Bella, A. Evaluation of airborne noise due to navigation and manoeuvring of large vessels. In Proceedings of the 24th International Congress on Sound and Vibration, London, UK, 23–27 July 2017. 46. Bakogiannis, K.; Argyropoulos, D.; Dagres, P.; Fotiou, N.; Cambourakis, G. Residential exposure to port noise, mapping and sources identifications: A case study of Pireaus, Greece. In Proceedings of the 22nd International Congress on Sound and Vibration, Florence, Italy, 12–16 July 2015. 47. Bolognese, M.; Fidecaro, F.; Palazzuoli, D.; Licitra, G. Port noise and complaints in the north tyrrhenian sea and framework for remediation. Environments 2020, 7, 17. [CrossRef] 48. Olszewski, G.C. Development and policy analysis of an effective noise management strategy for port metro Vancouver. In Proceedings of the Inter-Noise 2015, San Francisco, CA, USA, 9–12 August 2015. 49. Bjomstad, J.M. The Port Authority of New York and New Jersey noise management program. In Proceedings of the Inter-Noise 2015, San Francisco, CA, USA, 9–12 August 2015. 50. Puig, M.; Wooldridge, C.; Casal, J.; Darbra, R.M. Environmental reporting and communication—“Show me the evidence!”. In Proceedings of the GreenPort Congress, Antwerp, Belgium, 9–11 October 2013. 51. Baldinelli, G.; Marsico, G. State of the Art of Best Practices for Port Noise Management. Available online: http://anchorlife.eu/ deliverables/deliverable_A1_State_of_the_art.pdf (accessed on 22 December 2020). 52. NoMEPorts 2008. Noise Management in European Ports, LIFE05 ENV/NL/000018, Good Practice Guide on Port Area Noise Mapping and Management; Technical Annex; Environment-LIFE: Brussels, Belgium, 2008.